Apparatus for lubricating the driving parts of engines



E. SCI'INEIDE APPARATUS EUR LUBRICATING THE DRIVING PARTS 0F ENGINESl APPLICATION FILED IUNE I6, I9I9.

naar s EUGENE scHNErDER, or PARis, FRANCE, AssIeNoR To sc rrNErDER a CIE., or PARIS,

FRANCE, A LiifirfrnnaorNr-s'rocx COMPANY or FRANCE.

APPARATUS FOR LUBRICATING THE DRIVING- '.PAR'lfS OF E1\`|'GrI1\TES.

Lesa-,ssa

' i Specification of Letters Patent. ,i Patgnfted @et 5, i920;

Applicationiiled June 16, 1919. Serial No. 304,659.

of Engines, which invention is fully set forth in the following specification.

For the purpose of effecting'the forced lubrication of the bearings of the engine 'shaft and thejoints of the driving connecting rods inA vertical engines, it has been customary to vemploy theA means consisting in conveying the lubricant under pressure to the underneath portion of the step of the engine bearing in annular grooves extendi ing over the entire interior circumference of the steps, whence after having lubricated the latter, the lubricant passes to the bearings of the'he'ads or large ends of the driving connecting rods through passagesl i. formed in the engine shaft; then after having lubricated these connecting rod bearings the lubricant enters a channel formed in the shank of the connecting rod.4 on its way to thebearing in the foot or small end of the lconnecting rod.

However, with. this method as vcarried-out at present more particularly in Diesel engines and especially'7 in those Vworking on the two-` kstroke cycle, where the vhigh pressures act 'always downwardly -upon the parts, the Aknown arrangement has the drawback that it does not maintain ina sufficiently efficacious manner the pressure of the oil between .the bearing surfaces. The result of; this is a defective circulation in the passages which are not kept completely full with lubricant.

the said lubricant. will therefore pass out kat the sides of said steps.

The apparatus forming the subject matter meeting rod is constructed like" the steps of.v

of the present invention vremedies those drawbacks. With this object thetransverse grooves formed in the steps of the bearings of the crank shaft, likethose that are formed in the upper step of the head of the connecting rod and in the step of the foot of the'connecting rod, are madev to extend only over an arc that is smaller than the arc (about 120) over lwhich the, pressure ofthe movable parts acts upon the said steps,

The result of this is that communication is established only periodically between the passages formed in the shaft and the aforesaid grooves, sothat the lubricant remains so to speak confined in'oil-tight recesses and escapes therefrom only at the desired times and solely through the proper passages. In the accompanying drawings: i Figure 1" is a longitudinal section of an engine set towliich the improved apparatus is applied. i f n Fig. 2 is a partial section on the line II-II of Fig. l1.

Fig. 3 is a plan of a step shaft bearing.

Fig. 4 is a plan of the upper step of driving connecting rod.

,1 and 1 .are the engine shaft bearings; 2, 2 are their steps; 3 is the engine shaft; 4 is the driving connecting rod; 5 is its head step; 6 its foot step; 7.is the driviiigpiston; and 8 is the driving piston pin.

The lubricating oil enters under pressure through the orifices 9, 9,- provided in the lower part of the engine shaft bearings. v l The oil fills the lubricating grooves 10, 10, whence it can pass on to the bearing surfaces being ldrawn slightly by the rotation of the shaft; it also fills the transverse grooves 11, 11, which extend overan arc of about `105 to 100o toward the center of the steps.

The pressure of the shaft upon the step lacts over anl angle of about 120o (the part shown hatched on the steps in Fig. 3), so that the oil confined in the grooves 11 is unable `to vescape between the bearing surfaces nor consequently can it escape around the steps. i'

`Right opposite the gr oves 11, 11 there opens one of the ends o ya passage 12, 12 which extends in a diametral plane through of. the engine the the shaft-and terminates at its opposite end at the center of the crank pin.

The upper step ofthe head 'of the conthe engine shaft bearings. vIt comprises a longitudinal groove 13 .Par effecting its own in lubrication, and a transverse groove 14 extending through an angle of about o over the middle of the said step.

Into this groove 14 there opens the passage 15 formed in the shank of the connect- 11o grooves in the other steps.

It is to be understood that a't the moment when the passages 12 in the engine shaft come opposite the partial transverse grooves 11, 11 in the steps of the engine shaft bearings, the oil under pressure will enter said passages and will pass into the grooves 13 and 14 of the step in the head of the connectino' rod and thereby lubricate said step.

uring this period, since the passage 15 l5 in the connecting rod shank et opens into the partial transverse groove 14 which vis full of oil under pressure, this oil will enter the said passage and will rise as faras `the step of the foot of the' connecting rod and lubricate said step by `flowing yinto the grooves 16 and 1"?,V

A When, during the rotation, the passages' 12, 12 of the engine shaft vcease to beopposite the transverse grooves 11,11 in the steps l of the engine shaft bearings, the said pasf sages will no longer open into the groove n 14 in the step of the connecting rod head.

In these circumstances the flow of the oil- A ceases; but the oil 'that is confined between the bearingsurfaces of the s teps and of the engine shaft, and of the joints of the con-* again opposite the transverse grooves.

the lubrication until a suicient supply of oil is admitted when the passages 12 come f The flow of the oil takes place therefore in a periodic manner and without any possibilit of escape.

hat I claim is.:-

InA a system for lubricating shaft and piston rod bearings for vertical engines, the combination of a crank shaft Vhaving an oiling duct the opposite ends of which open on vthe working-pressure sides of the crankf shaft journal and the crank-shaft wristepin, bearings for said shaft journals each having cross-grooves for receiving oil under pres- `sure located on the pressure side of the bearings a'ndadapted to register with said oil duct during its passage over an angular displacement of about 1054100, and a tubular piston-rod having steps in which are formed cross-grooves open lto eachother through Asaid piston-rod and to said oil duct during said angular displacement. In testimony whereof I l have signal this specification.

soenna sonNninnR.

Witnesses ,ANDR Mos'rrcnnn,

CHAs.. P. Pansen. 

